TY  - BOOK
AU  - Collison,R.D.
TI  - The theory of political economy
SN  - 014040015X
AV  - ERB HB98.J4C64 
PY  - 1970///
CY  - Middlesex
PB  - Penguin Books
KW  - Economics
KW  - Mathematical
N1  - Includes bibliographies
ER  -